channelInfo's fields on tracker are different to the obd.

[neocarmack]

This issue is the tenth bug in issue 53: #53

10. channelInfo's fields are different from the obd.
    when obd commits channelInfo to a tracker, now we have the code to convert:

    //infoRequest is the data submit to tracker
	infoRequest.PeerIdA = channelInfo.PeerIdA
	infoRequest.PeerIdB = channelInfo.PeerIdB

	infoRequest.IsAlice = false
	if commitmentTx.Id > 0 {
		if commitmentTx.Owner == channelInfo.PeerIdA {
			infoRequest.IsAlice = true
			infoRequest.AmountA = commitmentTx.AmountToRSMC
			infoRequest.AmountB = commitmentTx.AmountToCounterparty
		} else {
			infoRequest.AmountB = commitmentTx.AmountToRSMC
			infoRequest.AmountA = commitmentTx.AmountToCounterparty
		}
	}

We should modify channelInfo's fields to be the same as the tracker. It will be easy when updates the sync mode between the obd and tracker.

channelInfo.IsAlice should be a function, it's a computed field. For example:

func (c *channelInfo)IsAlice(currentUserPeerID) bool{
	return c.PeerIdA==currentUserPeerID
}